PITTSBURGH — A former school security guard accused of keeping a teenage runaway in his home for a decade and having sex with her pleaded guilty to all charges he faced on Tuesday and was sentenced to five to 15 years in prison.

Thomas John Hose, 49, of McKeesport, took in the 14-year-old girl and, for a decade, kept her from leaving the tiny home he shared with his parents and son, prosecutors said. Tanya Nicole Kach, now 25, has said the two regularly had sex during the time she was in the home.

Hose had been a security guard at Kach's school, and Kach went to live with him in February 1996. She has said she had a crush on him. She eventually revealed her identity as a runaway to a deli owner she had befriended.

The Associated Press normally does not name victims of suspected sex crimes, but Kach has spoken with reporters about her experience.

Kach read from a letter, her voice faltering and her eyes welling with tears, during the hearing.

"I just want to know why you did what you did to me for 10 years. Why?" Kach asked. Hose took away her innocence and made her feel as though no one loved her, she said.

Kach said she finished her GED and will be "going places" in life without Hose.

Hose apologized, but also drew a rebuke from Allegheny County Judge John Zottola in the process.

"Only God knows how sorry I truly am," Hose said.

But he also said he remembers Kach repeatedly telling him, "Thank you, because without you, I'd be dead or in the streets."

Zottola replied, "You give yourself clearly too much credit. ... You see yourself as completely different than the rest of the world."

Kach said Hose did anything but help her, quoting something he repeatedly told her: "Oh, you're just a pretty face. You're so stupid, you'd be nothing without me."

Hose's trial was scheduled to begin Tuesday, but instead he pleaded guilty to statutory sexual assault, three counts of involuntary deviate sexual intercourse, two counts of indecent assault and one count each of endangering the welfare of children, corruption of a minor, interference with custody of children and aggravated indecent assault.